Step 1: Ask her if she'd be interested in playing a computer game with you sometime when you both have free time and not much interesting going on. If she says yes then go to Step 2.
Step 2: Ask her if she liked playing with blocks, legos, etc as a kid where you can be all kinds of creative. If she says yes then go to Step 3.
Step 3: Buy two copies of Minecraft and see how she likes it. You can setup a private server between your laptops and either be creative together and have fun or survive together and have fun. Either way the key point is having fun together and I chose Minecraft because it can be pretty basic yet very engaging at the same time.
Note: If she doesn't like computer games, invest in a deck of cards or something. UNO was always a good game.